Receiving apparatus for radiosignals



R. A. WEAGANT.

RECEIVING APPARATUS FOR RADIOSIGNALS.

APPLICATION FILED MAR. 6. 1920.

PatenteA Dc.12,1922,

2 SHEETS-SHEET 1.

A TTOR/VE) R. A. WEAGANT.

RECEIVING APPARATUS FOR RADIOSIGNALS.

APPLICATION FILED MAR. 6. 1920.

1,438,,84PY, v Patented; Dec. 1922.,

2 SHEETS T 2'.

Patented Deco 12, 19 22.

4 UNITED/ STATES LATENT QFFICE.

ROY A. wnaoam, or nouems Manon. new vonmnssrcnon To name conrone- 'rron or AMERICA,.A CORPORATION or DELAWARE.

RECEIVING APPARATUS FOR RADIOSIGNALS.

Application filed March 6, 1920; Serial No. 368,741.

To all whom it may concern:

Be it known that I, ROY A. WEAGANT, a

citizen of the United States, residing at Douglas Manor, in the county of Queens and State of New York, have invented certain new and useful Improvements in Receiving Apparatus for Radiosignals, of which the following is a disclosure.

l/ly invention relates'to systems for receiving radio signals and particularly to systems which comprise a plurality of antennm or current collecting-devices situated at a distance from each other and connected to a common indicating device.

Receivers of this general class have been used invwhich long horizontal leads'are em ployed to conduct the signal impulses or currents set up in the antennae or collectors by the signal waves to the detector and indicating device, and it has been found that such long horizontal leads, however they be situated or supported, operate to collect objectionable quantities of both signal and static. In the prior art arrangements it has been customary to conduct the undesired currents set up in the horizontal leads, along with the signal currents collected in the antennee, into the amplifiers and receivers. In these prior arrangements, therefore, the undesired currents set up in the horizontal leads were amplified equally with the currents set up in the collectors, and as it was customary to employ amplifiers magnifying the currents hundreds of times. these undesired currents have proven objectionable.

According to my improved arrangement described and claimed herein, l locate amplifying devices at the antennae or current collecting devices, and the arrangement is such that. some, and preferably the major part, of the desired amplification is had at the antennae and the amplified. currents of the antennae are transmitted from theantennae to the common receiver. In -prac tising my invention, further amplification may he efiected at the common receiver.

In the drawing accompanying and forming a part of this specification, l have illustrated the preferred embodiment'of my invention.

In this drawing, Fig. 1 shows an arrangement wherein all of the amplification is had at the collectors and audio frequency currents are transmitted fr m he electrodes to the common receiver. Fig. 2 shows a modification wherein a portion only of the amplification is had at the collectors and the currents are transmitted at radio frequency to the common receiver where further amplification is had.

Referring to Fig. 1 of this drawing, it will be seen that I provide two loop collectors I for collecting the signal currents from the ether waves. These loops or cages, as they may be termed, are preferably located in the line of signal propagation, and should be separated an appreciable fraction of-a wave length from each other, as described in my application, Serial No. 181458, filed July 19, 1917. The loops are provided with inductance coils 1 and variable condensers c for tuning purposes. Associated with each loop and located at the loop there is provided an amplifier of the vacuum tube type, that shown being a well known two-stage arrangement. Each amplifier comprises two evacuated vessels 1;, each comprising an anode a, filament f and grid 9, these elements being connected in a usual way for amplifying signal currents collected by the loops 1. These amplifiers are connected to each other by iron core transformers a2 and serve to amplify the currents set up in the cages to convert them into currents of audio frequency. The amplified currents are transmitted through the long horizontal leads 2 to a radiogoniometer 3 comprising fixed coils 4 and movable coil 5. The telephone 75 is connected tothe movable coil 5 and operates to make the signals audible.

The arrangement illustrated in Fig. 2 is in general the same as that shown in Fig. 1. except that the amplifiers at the cages are coupled to each other by air core transformers m constructed and adapted to amplify radio frequency currents and to deliver radio frequency currents into the horizontal leads. Also further amplification is provided for at the common receiver and it will be noted that the leads from the movable coil' 5 of the goniometer are connected to a two-stage amplifier of the usual type shown at 'v. This amplifier amplifies cur- .rents and transforms them into currents of paratus above described embodies the general features of improvements set forth in my said application Serial No. 181,458, and in using the said apparatus it can and should be adjusted for the elimination of static, as described in said application. That is to say, in using this apparatus it should be ad- 'usted so that the signal currents collected y the two loops will arrive at the radiogoniometer successively, and the goniometer should be so set as to cause these signal, currents to add or reinforce each other. Static currents collected in the cages, on the contrary, will arrive at the goniometer from the cages substantially in phase or simultaneously, and the goniometer therefore may be employed to cancel out the static disturbances. The feature of improvement claimed herein, however, is the idea of locating amplifiers at the cages or outer ends of the long horizontal leads, so that the signal and static currents derived from the cages will be large compared with those derived from the leads.

, It should also be understood that the invention claimed herein is applicable to all forms of receiving systems wherein the collector or collectors are located at a distance from the receiver or indicator, and are connected to the receiver or indicator by horizontal leads exposed to static disturbances.-

Having now described my invention, what I claim is:

1. A receiving system for radio signals comprising a plurality of antennae, one \Qf said antennae being situated at a relatively great distance from a common receiving instrument, means located at each of said antennae for amplifying the currents collected therein, and means for conducting the amplified currents to said indicating instrument.

2. A receiving system for radio-signals comprising an antenna situated at a distance from a receiver and connected thereto by leads exposed to static and an amplifyingdevice located at and connected to the antenna, and adapted to supply amplified currents to the leads.

3. A receiving system for radio signals comprising a plurality of antennae situated at a distance from each other and connected to a common indicating device through leads exposed to static disturbances, current amplifying devices located at each of the antennae and adapted to supply amplified signal currents to the leads, substantially as described.

4. A receiving system for radio signals comprising a plurality of antennae situated at a distance from each other and connected to a common indicating device through leads ex osed to'static disturbances, current amplifying devices located at each of the antennae and adapted to supply amplified audio frequency signal currents to the leads, substantially as described.

5. A receiving system for radio signals comprising in combination an antenna, an amplifying device located at the antenna, a receiving device located at a relatively great distance from the antenna and a. line for conducting the amplified currents to the receiver.

6. A receiving system for radio signals comprising in combination a plurality of antennae, an amplifying device located at each antenna, a receiving device. located at a relatively great distance from one or more of said antennae and lines for conducting the amplified currents to the receiving dev1ce.

7. receiving system for radio signals, comprising in combination, a plurality of 'antennae, current amplifying means located 'at each of the antennae for converting the antenna currents to amplified audio frequency currents, a receivlng device located at a relatively great distance from one or more of said antennae, and lines for conducting the amplified audio frequency currents to the receiving device.

, BUY A. WEAGANT. 

